Validate e-mail address

email_validation

- (BOOL) validEmail:(NSString*) emailString {

 

    if([emailString length]==0){

        return NO;

    }

 

    NSString *regExPattern = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

 

    NSRegularExpression *regEx = [[NSRegularExpression alloc] initWithPattern:regExPattern options:NSRegularExpressionCaseInsensitive error:nil];

    NSUInteger regExMatches = [regEx numberOfMatchesInString:emailString options:0 range:NSMakeRange(0, [emailString length])];

 

    NSLog(@"%i", regExMatches);

    if (regExMatches == 0) {

        return NO;

    } else {

        return YES;

    }

}